Basal Metabolic Rate (BMR) and calories needed

Basal metabolic rate (BMR or Basal Energy Expenditure, BEE) is the amount of energy expended while at rest in a neutrally temperate environment, in the post-absorptive state (meaning that the digestive system is inactive, which requires about twelve hours of fasting in humans). The release of energy in this state is sufficient only for the functioning of the vital organs, the heart, lungs and kidneys and the rest of the nervous system, intestine, muscles, etc.
The BMR can be responsible for burning up to 70% of the total calories expended, but this figure varies due to different factors. BMR is the largest factor in determining overall metabolic rate and how many calories you need to maintain, lose or gain weight. In this online calculator you must enter the gender (or "childrens"), height, weight, age, level of activity, stress factor.
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 Basal Metabolic Rate (BMR) and Basal Energy Expenditure
  Click on a category Male Female Childrens
  Input Height in cm
  Input Weight lb kg
  Input Age yrs mos
  Level Activity:
  Stress Factor

  Daily Basal Metabolic Rate   = kcals/day  
  Daily Caloric Requirement   = kcals/day  

Factors for men
BMR/B.E.E. = 66.5 + (13.75 x kg) + (5.003 x cm) - (6.775 x age)

Factors for women
BMR/B.E.E. = 655.1 + (9.563 x kg) + (1.850 x cm) - (4.676 x age)

Factors for childrens
BMR/B.E.E. = 22.10 + (31.05 x kg) + (1.16 x cm)

Formula: Harris J, Benedict F. "A biometric study of basal metabolism in man". Washington D.C. Carnegie Institute of Washington. 1919.

Please, pay attention: this calculator is provided for your information only. It is not a substitute for professional medical advice, and may not represent your true individual medical situation. Do not use this information to make significant changes in your diet, exercise regimen, or other aspects of your lifestyle without consulting your physician or other qualified health care provider.